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   1  <?php
   2  require  '../load_wact.php';
   3  require WACT_ROOT . 'template/template.inc.php';
   4  require WACT_ROOT . 'request/getdata.inc.php';
   5  
   6  // Initialize $_GET['page']
   7  if ( !isset($_GET['page']) )
   8      $_GET['page']=1;
   9  $GetDataSpace = new GetDataSpace();
  10  
  11  $Page =& new Template('/outputcache.html');
  12  $Page->set('Time',date('H:i:s'));
  13  $Page->set('Page',$_GET['page']);
  14  
  15  $Cache2 = & $Page->getChild('Cache2');
  16  $Cache2->import($GetDataSpace->export());
  17  
  18  if ( $GetDataSpace->get('flush') == 1 ) {
  19      $Cache2->flushGroup();
  20  }
  21  
  22  // Some HTTP client side caching, to save on bandwidth - this might eventually
  23  // become a runtime component as well...
  24  
  25  // Get the other two cache components
  26  $caches = array();
  27  $caches['Cache1'] = & $Page->getChild('Cache1');
  28  $caches['Cache2'] = & $Cache2;
  29  $caches['Cache3'] = & $Page->getChild('Cache3');
  30  
  31  // Find the most recent modification time of all three caches
  32  $lastModified = 1;
  33  foreach ( array_keys($caches) as $key ) {
  34      if (($cacheModified=$caches[$key]->lastModified()) > $lastModified)
  35          $lastModified = $cacheModified;
  36  }
  37  
  38  // Issue an HTTP last modified header
  39  header ( 'Last-Modified: '.
  40      gmdate('D, d M Y H:i:s',$lastModified).' GMT');
  41  
  42  // Get client headers - Apache only
  43  $request = getallheaders();
  44  
  45  // Check to see if the client sent the If-Modified-Since header
  46  if ( isset($request['If-Modified-Since']) ) {
  47      // Split the If-Modified-Since (Netscape < v6 sends this incorrectly)
  48      $modifiedSince = explode(';', $request['If-Modified-Since']);
  49      // Turn the client request If-Modified-Since into a timestamp
  50      $modifiedSince = strtotime($modifiedSince[0]);
  51  
  52      if ($lastModified <= $modifiedSince) {
  53          // Save on some bandwidth!
  54          header('HTTP/1.0 304 Not Modified');
  55          die();
  56      }
  57  }
  58  
  59  $Page->display();
  60  ?>